


import os
from argparse import ArgumentParser
from typing import List

import torch.utils.data

from datasets import Dataset, IterableDataset
from datasets.distributed import split_dataset_by_node


__UpperCamelCase     		=							4
__UpperCamelCase     		=							3







class 							lowerCamelCase__						(				UpperCAmelCase   ):






			"""simple docstring"""






			pass



def 							UpperCamelCase_(					_A :List[str]	)->		Tuple:
			for shard in shards:
						for i in range(_A	):
									yield {"i": i, "shard": shard}
def 							UpperCamelCase_(					)->		str:
			UpperCamelCase__       =							int(os.environ["RANK"]	)
			UpperCamelCase__       =							int(os.environ["WORLD_SIZE"]	)

			UpperCamelCase__       =							ArgumentParser()
			parser.add_argument("--streaming"					,  type=_A	)
			parser.add_argument("--local_rank"					,  type=_A	)
			parser.add_argument("--num_workers"					,  type=_A					,  default=0	)
			UpperCamelCase__       =							parser.parse_args()
			UpperCamelCase__       =							args.streaming
			UpperCamelCase__       =							args.num_workers

			UpperCamelCase__       =							{"shards": [F'''shard_{shard_idx}''' for shard_idx in range(_A	)]}
			UpperCamelCase__       =							IterableDataset.from_generator(_A					,  gen_kwargs=_A	)
			if not streaming:
						UpperCamelCase__       =							Dataset.from_list(list(_A	)	)

			UpperCamelCase__       =							split_dataset_by_node(_A					,  rank=_A					,  world_size=_A	)
			UpperCamelCase__       =							torch.utils.data.DataLoader(_A					,  num_workers=_A	)

			UpperCamelCase__       =							NUM_SHARDS * NUM_ITEMS_PER_SHARD
			UpperCamelCase__       =							full_size // world_size
			expected_local_size += int(rank < (full_size % world_size)	)

			UpperCamelCase__       =							sum(1 for _ in dataloader	)
			if local_size != expected_local_size:
						raise FailedTestError(F'''local_size {local_size} != expected_local_size {expected_local_size}'''	)


if __name__ == "__main__":
						main()






__UpperCamelCase     		=							2_5_6
# Modulus to hash a string
__UpperCamelCase     		=							1_0_0_0_0_0_3
def 							UpperCamelCase_(					_A :str					,  _A :str	)->		bool:
			UpperCamelCase__       =							len(_A	)
			UpperCamelCase__       =							len(_A	)
			if p_len > t_len:
						return False

			UpperCamelCase__       =							0
			UpperCamelCase__       =							0
			UpperCamelCase__       =							1

			# Calculating the hash of pattern and substring of text
			for i in range(_A	):
						UpperCamelCase__       =							(ord(pattern[i]	) + p_hash * alphabet_size) % modulus
						UpperCamelCase__       =							(ord(text[i]	) + text_hash * alphabet_size) % modulus
						if i == p_len - 1:
									continue
						UpperCamelCase__       =							(modulus_power * alphabet_size) % modulus

			for i in range(0					,  t_len - p_len + 1	):
						if text_hash == p_hash and text[i : i + p_len] == pattern:
									return True
						if i == t_len - p_len:
									continue
						# Calculate the https://en.wikipedia.org/wiki/Rolling_hash
						UpperCamelCase__       =							(
						    (text_hash - ord(text[i]	) * modulus_power) * alphabet_size
						    + ord(text[i + p_len]	)
						) % modulus
			return False
def 							UpperCamelCase_(					)->		None:
			UpperCamelCase__       =							"abc1abc12"
			UpperCamelCase__       =							"alskfjaldsabc1abc1abc12k23adsfabcabc"
			UpperCamelCase__       =							"alskfjaldsk23adsfabcabc"
			assert rabin_karp(_A					,  _A	) and not rabin_karp(_A					,  _A	)

			# Test 2)
			UpperCamelCase__       =							"ABABX"
			UpperCamelCase__       =							"ABABZABABYABABX"
			assert rabin_karp(_A					,  _A	)

			# Test 3)
			UpperCamelCase__       =							"AAAB"
			UpperCamelCase__       =							"ABAAAAAB"
			assert rabin_karp(_A					,  _A	)

			# Test 4)
			UpperCamelCase__       =							"abcdabcy"
			UpperCamelCase__       =							"abcxabcdabxabcdabcdabcy"
			assert rabin_karp(_A					,  _A	)

			# Test 5)
			UpperCamelCase__       =							"Lü"
			UpperCamelCase__       =							"Lüsai"
			assert rabin_karp(_A					,  _A	)
			UpperCamelCase__       =							"Lue"
			assert not rabin_karp(_A					,  _A	)
			print("Success."	)


if __name__ == "__main__":
						test_rabin_karp()


